I am looking for a service something similar to Lead Forensics or WhoIsVisiting.com

I understand that the information you can provide will not necessarily display the company names like the above, however you can sometimes identify this using the Hostname. Do you have an API feed where this information can be pulled from to allow me to run this lookup real time with people visiting my website?

Are there any additional services you know that would provide company name information against static IP addresses?